Ashlee Simpson-Wentz and her rock-star husband Pete Wentz have become parents for the first time, People magazine reported on Friday.

Simpson-Wentz, 24, delivered a boy, named Bronx Mowgli Wentz, on Thursday, and all are doing well, People quoted a spokesperson as saying.

The report did not specify a location, but rival tabloid In Touch Weekly reported earlier on Thursday that Simpson-Wentz was at Cedars-Sinai Medical Center in Los Angeles.

The singer, the younger sister of tabloid magnet Jessica Simpson, has released three albums, and is famous for singing to a prerecorded track that malfunctioned on "Saturday Night Live" in 2004. She married Wentz this past May.

Wentz is the bass player and main lyricist for the pop-punk band Fall Out Boy, which topped the U.S. album chart in February 2007 with its most recent album, "Infinity on High."